Toss the shrimp with the lime juice in a bowl.,Mix the garlic pwdr, onion pwdr, thyme, salt, red pepper and black pepper in a small bowl.,Sprinkle over the shrimp and toss to coat well.,Spray a large skillet with non-stick cooking spray.,Heat till warm.,______,Spoon into a serving dish.,Chill, covered, for 1 hour or possibly longer.,Garnish with lime wedges.,Makes 15 servings.